Casio - FX-260 Solar II Scientific Calculator, 10-Digit x Two-Line Display, LCD - Sold As 1 Each. All purpose scientific calculator offers fraction calculation, trigonometric functions and is solar powered. Power Source(s): Solar; Display Notation: Numeric; Number of Display Digits: N/A; Display Characters x Display Lines: 10 x 2.All purpose scientific calculator offers fraction calculation, trigonometric functions and is solar powered. Hard Slide Case.